(:**************************************************************:)
(: Test: functx-functx-follows-not-descendant-1                                  :)
(: Written by: Priscilla Walmsley (Frans Englich is maintainer) :)
(: Date: 2008-05-16+02:00                                       :)
(:**************************************************************:)

declare namespace functx = "http://www.example.com/";
(:~
 : Whether an XML node follows another without being its descendant 
 :
 : @author  W3C XML Query Working Group 
 : @version 1.0 
 : @see     http://www.xqueryfunctions.com/xq/functx_follows-not-descendant.html 
 : @param   $a the first node 
 : @param   $b the second node 
 :) 
declare function functx:follows-not-descendant 
  ( $a as node()? ,
    $b as node()? )  as xs:boolean {
       
   $a >> $b and empty($b intersect $a/ancestor::node())
 } ;

let $in-xml := <authors>
   <author>
      <fName>Kate</fName>
      <lName>Jones</lName>
   </author>
   <author>
      <fName>John</fName>
      <lName>Doe</lName>
   </author>
</authors>
return (functx:follows-not-descendant(
     $in-xml//author[2],$in-xml//author[1]))
